In the year 20XX, mysterious gates appear in different regions in the world. Invaders emerge from the gate and Zillions of Enemy X ravage the Earth. The five gates are in Washington (USA), Tokyo (Japan), Pretoria (South Africa), and Paris (France).

Zillions of Enemy X from Nippon Ichi Software takes place decades after the Days of the Apocalypse. There are five different heroes in the game:

Quinn Forsythe, a marine from America

Cecil Royale, a journalist from France

Steve Shibaya, a researcher from South Africa

Kaede Kaga, a black market trader from Japan

Natalia Cambiasso, a NPO member from Argentina

Players will fight the ZX using a "device" which is highly regulated item. Devices are worth even more if they’re blank. These devices are used in the game’s card battle system which lets players summon ZX by spending SP. The ZX you summon act as attackers and defenders. If enemy ZX close in and attack hit one of the protagonists you lose LP.

Need more ZXes? You can capture enemies and turn them into cards by doing a Code Hack.

Each ZX has its own set of abilities. If you want to defeat more powerful enemies you will need to customize your deck.

There are over 250 ZX cards in Zillions of Enemy X and Nippon Ichi Software used illustrations from the trading card game.